Chip package structure having at least one chip and at least one thermally conductive element and manufacturing method thereof

ABSTRACT

A chip package structure includes at least one chip, at least one thermally conductive element, a molding compound, and a redistribution layer. The respective chip has an active surface and a back surface opposite to each other and a plurality of electrodes disposed on the active surface. The thermally conductive element is disposed on the back surface of the respective chip. The molding compound encapsulates the chip and the thermally conductive element and has an upper surface and a lower surface opposite to each other. A bottom surface of each of the electrodes of the respective chip is aligned with the lower surface of the molding compound. The molding compound exposes a top surface of the respective thermally conductive element. The redistribution layer is disposed on the lower surface of the molding compound and electrically connected to the electrodes of the respective chip.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to a package structure and a manufacturing methodthereof, and in particular to a chip package structure and amanufacturing method thereof.

Description of Related Art

The use of a fan-out multi-band antenna wafer-level package design mayminiaturize electronic circuits and significantly reduce electricalinsertion loss. In the future, as electronic products become faster andfaster in transmission frequency and operating speed, the accompanyingheat dissipation issue of chips will become more and more important.However, in the manufacture of the fan-out multi-band antennawafer-level package, the active surface of the chip is faced up andback-bonded to a first redistribution layer used as the antenna groundpattern, and then a second redistribution layer electrically connectedto solder balls is formed on the active surface of the chip. Therefore,a heat sink or a cooling fin may not be added to the manufacturingmethod to dissipate heat from the chip, and as a result the heatdissipation issue of the fan-out multi-band antenna wafer-level packagemay not be solved.

SUMMARY OF THE INVENTION

The invention provides a chip package structure having better heatdissipation effect.

The invention provides a manufacturing method of a chip packagestructure used for manufacturing the above chip package structure.

A chip package structure of the invention includes at least one chip, atleast one thermally conductive element, a molding compound, and aredistribution layer. The respective chip has an active surface and aback surface opposite to each other and a plurality of electrodesdisposed on the active surface. The thermally conductive element isdisposed on the back surface of the respective chip. The moldingcompound encapsulates the chip and the thermally conductive element andhas an upper surface and a lower surface opposite to each other. Abottom surface of each of the electrodes of the respective chip isaligned with the lower surface of the molding compound. The moldingcompound exposes a top surface of the respective thermally conductiveelement. The redistribution layer is disposed on the lower surface ofthe molding compound and electrically connected to the electrodes of therespective chip.

In an embodiment of the invention, the chip package structure furtherincludes at least one conductive through hole, at least one first pad,and at least one second pad. The conductive through hole penetrates themolding compound and is connected to the upper surface and the lowersurface. The first pad is disposed on the upper surface of the moldingcompound and electrically connected to a first end of the respectiveconductive through hole. The second pad is disposed on the lower surfaceof the molding compound and electrically connected to a second end ofthe respective conductive through hole, wherein the redistribution layeris electrically connected to the second pad.

In an embodiment of the invention, the chip package structure furtherincludes an antenna structure layer disposed on the upper surface of themolding compound and includes a dielectric layer and a plurality ofantenna patterns. The dielectric layer has at least one opening exposingthe thermally conductive element, and the dielectric layer covers theupper surface of the molding compound and the first pad. The antennapatterns are embedded in the dielectric layer and aligned with a surfaceof the dielectric layer that is relatively far from the moldingcompound. The antenna patterns are electrically connected to the firstpad.

In an embodiment of the invention, the at least one chip is at least oneradio frequency chip.

In an embodiment of the invention, the at least one chip includes afirst chip and a second chip. The antenna patterns are disposedcorresponding to the first chip.

In an embodiment of the invention, the first chip is a radio frequencychip, and the second chip is a baseband chip.

In an embodiment of the invention, the at least one chip is at least onebaseband chip.

In an embodiment of the invention, the chip package structure furtherincludes a plurality of solder balls disposed on a plurality of fan-outpads of the redistribution layer and electrically connected to theredistribution layer.

In an embodiment of the invention, an orthographic projection area ofthe respective thermally conductive element on the back surface of therespective chip is smaller than an area of the back surface.

In an embodiment of the invention, the chip package structure furtherincludes at least one thermal interface material disposed between thethermally conductive element and the chip. The thermally conductiveelement is fixed on the chip via the thermal interface material.

A manufacturing method of a chip package structure of the inventionincludes the following steps. A carrier with an adhesive layer formed isprovided. At least one chip and at least one thermally conductiveelement are provided. The respective chip has an active surface and aback surface opposite to each other and a plurality of electrodesdisposed on the active surface. The respective thermally conductiveelement is disposed on the back surface of the respective chip. The chipis bonded to the carrier, wherein the electrodes of the respective chipare directly in contact with the adhesive layer. A molding compound isformed on the carrier to cover the adhesive layer and encapsulate thechip and the thermally conductive element. A portion of the moldingcompound is removed such that the molding compound exposes a top surfaceof the respective thermally conductive element. The carrier and theadhesive layer are removed to expose the electrodes of the respectivechip and a lower surface of the molding compound. A bottom surface ofeach of the electrodes of the respective chip is aligned with the lowersurface of the molding compound. A redistribution layer is formed on thelower surface of the molding compound. The redistribution layer iselectrically connected to the electrodes of the respective chip.

In an embodiment of the invention, after the carrier and the adhesivelayer are removed and before the redistribution layer is formed, themethod further includes the following steps. At least one conductivethrough hole is formed to penetrate the molding compound and connect anupper surface of the molding compound opposite to the lower surface andthe lower surface. At least one first pad is formed on the upper surfaceof the molding compound, wherein the first pad is electrically connectedto a first end of the respective conductive through hole. At least onesecond pad is formed on the lower surface of the molding compound,wherein the second pad is electrically connected to a second end of therespective conductive through hole.

In an embodiment of the invention, before the redistribution layer isformed, the method further includes forming an antenna structure layeron the upper surface of the molding compound. The antenna structurelayer includes a dielectric layer and a plurality of antenna patterns.The dielectric layer has at least one opening exposing the thermallyconductive element, and the dielectric layer covers the upper surface ofthe molding compound and the first pad. The antenna patterns areembedded in the dielectric layer and aligned with a surface of thedielectric layer that is relatively far from the molding compound. Theantenna patterns are electrically connected to the first pad.

In an embodiment of the invention, the at least one chip is at least oneradio frequency chip.

In an embodiment of the invention, the at least one chip includes afirst chip and a second chip. The antenna patterns are disposedcorresponding to the first chip.

In an embodiment of the invention, the first chip is a radio frequencychip, and the second chip is a baseband chip.

In an embodiment of the invention, the at least one chip is at least onebaseband chip.

In an embodiment of the invention, after the redistribution layer isformed, the method further includes forming a plurality of solder ballson a plurality of fan-out pads of the redistributed layer, wherein thesolder balls are electrically connected to the redistribution layer.

In an embodiment of the invention, an orthographic projection area ofthe respective thermally conductive element on the back surface of therespective chip is smaller than an area of the back surface.

In an embodiment of the invention, the manufacturing method of the chippackage structure further includes providing at least one thermalinterface material between the thermally conductive element and thechip, wherein the thermally conductive element is fixed on the chip viathe thermal interface material.

Based on the above, in the design of the chip package structure of theinvention, the thermally conductive element is disposed on the backsurface of the chip, and the top surface of the thermally conductiveelement is exposed by the molding compound. Therefore, the heatgenerated by the chip may be quickly transferred to the outside via thethermally conductive element, so that the chip package structure of theinvention may have a better heat dissipation effect. In addition, theredistribution layer is disposed on the lower surface of the moldingcompound and is electrically connected to the electrodes of the chip, sothat the chip package structure of the invention may have betterelectrical performance. In short, the chip package structure of theinvention may simultaneously have good electrical performance and heatdissipation performance, so that the function of the chip may bemaintained normally without overheating, thereby effectively extendingthe service life of the chip package structure.

In order to make the aforementioned features and advantages of thedisclosure more comprehensible, embodiments accompanied with figures aredescribed in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated in and constitute apart of this specification. The drawings illustrate embodiments of theinvention and, together with the description, serve to explain theprinciples of the invention.

FIG. 1A to FIG. 1J show cross-sectional views of a manufacturing methodof a chip package structure of an embodiment of the invention.

FIG. 2 shows a top view of the chip package structure of FIG. 1J.

FIG. 3 is a cross-sectional view of a chip package structure of anembodiment of the invention.

FIG. 4 is a cross-sectional view of a chip package structure of anotherembodiment of the invention.

FIG. 5 is a cross-sectional view of a chip package structure of yetanother embodiment of the invention.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1A to FIG. 1J show cross-sectional views of a manufacturing methodof a chip package structure of an embodiment of the invention. FIG. 2shows a top view of the chip package structure of FIG. 1J. Regarding themanufacturing method of the chip package structure of the presentembodiment, first refer to FIG. 1A in which a carrier 10 with anadhesive layer 12 formed is provided. Herein, the adhesive layer 12 is,for example, a double-sided thermal release tape, but is not limitedthereto.

Next, referring to FIG. 1B, at least one chip (one chip 110 isschematically shown) and at least one thermally conductive element (onethermally conductive element 120 is schematically shown) are provided.The chip 110 has an active surface 111 and a back surface 113 oppositeto each other and a plurality of electrodes 112 disposed on the activesurface 111. The thermally conductive element 120 is disposed on theback surface 113 of the chip 110. Furthermore, at least one thermalinterface material (TIM) (one thermal interface material 125 isschematically shown) may be provided between the thermally conductiveelement 120 and the chip 110, wherein the thermally conductive element120 may be fixed on the chip 110 via the thermal interface material 125.As shown in FIG. 1B, an orthographic projection area of the thermallyconductive element 120 on the back surface 113 of the chip 110 issmaller than the area of the back surface 113. Herein, the chip 110 isembodied as a radio frequency (RF) chip, and the thermally conductiveelement 120 is, for example, a heat spreader, but is not limitedthereto.

Next, referring to FIG. 1C, the chip 110 is bonded on the carrier 10,wherein the electrodes 112 of the chip 110 are directly in contact withthe adhesive layer 12. Herein, the chip 110 and the thermally conductiveelement 120 thereon are bonded on the adhesive layer 12 of the carrier10 with the active surface 111 faced down.

Next, referring to FIG. 1D, a molding compound 130 a is formed on thecarrier 10 to cover the adhesive layer 12 and encapsulate the chip 110and the thermally conductive element 120. At this time, the moldingcompound 130 a completely encapsulates the chip 110 and the thermallyconductive element 120. That is, a top surface 122 of the thermallyconductive element 120 is also covered by the molding compound 130.

Next, referring to FIG. 1D and FIG. 1E at the same time, a portion ofthe molding compound 130 a is removed by, for example, grinding, so thatthe molding compound 130 exposes the top surface 122 of the thermallyconductive element 120. Herein, the top surface 122 of the thermallyconductive element 120 is substantially aligned with an upper surface132 of the molding compound 130.

Next, referring to FIG. 1E and FIG. 1F at the same time, the carrier 10and the adhesive layer 12 are removed, and the electrodes 112 of thechip 110 and a lower surface 134 of the molding compound 130 opposite tothe upper surface 132 are exposed. Herein, a bottom surface 115 of eachof the electrodes 112 of the chip 110 is substantially aligned with thelower surface 134 of the molding compound 130.

Next, please refer to FIG. 1G and FIG. 1H at the same time. Throughholes are formed in the molding compound 130 via, for example, laserdrilling. Via electroplating hole filling, at least one conductivethrough hole (two conductive through holes 140 are schematically shown)is formed to penetrate the molding compound 130, at least one first pad(two first pads 150 are schematically shown) is formed on the uppersurface 132 of the molding compound 130, and at least one second pad(two second pads 155 are schematically shown) is formed on the lowersurface 134 of the molding compound 130. The conductive through holes140 are connected to the upper surface 132 and the lower surface 134,the first pads 150 are electrically connected to a first end 142 of eachof the conductive through holes 140, and the second pads 155 areelectrically connected to a second end 144 of each of the conductivethrough holes 140. Herein, the material of the conductive through holes140, the material of the first pads 150, and the material of the secondpads 155 are the same, and are, for example, copper, but not limitedthereto.

Next, please refer to FIG. 1I and FIG. 2 at the same time, an antennastructure layer 160 is formed on the upper surface 132 of the moldingcompound 130. The antenna structure layer 160 includes a dielectriclayer 162 and a plurality of antenna patterns 164. The dielectric layer162 has at least one opening (one opening 163 is schematically shown)exposing the thermally conductive element 120, and the dielectric layer162 covers the upper surface 132 of the molding compound 130 and thefirst pads 150. Herein, the dielectric layer 162 is, for example, aphoto-imageable dielectric layer, and the opening 163 is formed by, forexample, etching, but the invention is not limited thereto. The antennapatterns 164 are embedded in the dielectric layer 162 and aligned with asurface 165 of the dielectric layer 162 that is relatively far from themolding compound 130, wherein the antenna patterns 164 are electricallyconnected to the first pads 150. Herein, the antenna patterns 164include, for example, a plurality of patch antennas 164 a and aplurality of dipole antennas 164 b, and the material of the antennapatterns 164 is, for example, copper, but is not limited thereto.

Lastly, referring to FIG. 1J, a redistribution layer 170 is formed onthe lower surface 134 of the molding compound 130, wherein theredistribution layer 170 is electrically connected to the electrodes 112of the chip 110. Since an orthographic projection area of a patternedcircuit 172 of the redistribution layer 170 on the molding compound 130is greater than an orthographic projection area of the chip 110 on themolding compound 130, the patterned circuit 172 may be regarded as afan-out circuit. Next, a plurality of solder balls 180 are formed on aplurality of fan-out pads 174 of the redistribution layer 170, whereinthe solder balls 180 are electrically connected to the redistributionlayer 170. Lastly, at least one chip package structure 100 a as shown inFIG. 1J may be formed via a singulation process to complete themanufacture of the chip package structure 100 a.

Structurally, referring further to FIG. 1J, the chip package structure100 a of the present embodiment includes the chip 110, the thermallyconductive element 120, the molding compound 130, and the redistributionlayer 170. The chip 110 is, for example, a radio frequency chip, and hasthe active surface 111 and the back surface 113 opposite to each otherand the electrodes 112 disposed on the active surface 111. The thermallyconductive element 120 may be disposed and fixed on the back surface 113of the chip 110 via the thermal interface material 125, wherein theorthographic projection area of the thermally conductive element 120 onthe back surface 113 of the chip 110 is smaller than the area of theback surface 113. The molding compound 130 encapsulates the chip 110 andthe thermally conductive element 120 and has the upper surface 132 andthe lower surface 134 opposite to each other. The top surface 122 of thethermally conductive element 120 is aligned with the upper surface 132of the molding compound 130. The bottom surface 115 of the electrodes112 of the chip 110 is aligned with the lower surface 134 of the moldingcompound 130. The redistribution layer 170 is disposed on the lowersurface 134 of the molding compound 130 and electrically connected tothe electrodes 112 of the chip 110.

Furthermore, the chip package structure 100 a of the present embodimentfurther includes the conductive through holes 140, the first pads 150,and the second pads 155. The conductive through holes 140 penetrate themolding compound 130 and are connected to the upper surface 132 and thelower surface 134. The first pads 150 are disposed on the upper surface132 of the molding compound 130 and electrically connected to the firstend 142 of each of the conductive through holes 140. The second pads 155are disposed on the lower surface 134 of the molding compound 130 andelectrically connected to the second end 144 of each of the conductivethrough holes 140, wherein the patterned circuit layer 172 of theredistribution layer 170 is electrically connected to the second pads155.

In addition, the chip package structure 100 a of the present embodimentfurther includes the antenna structure layer 160 disposed on the uppersurface 132 of the molding compound 130 and including the dielectriclayer 162 and the antenna patterns 164. The dielectric layer 162 has theopening 163 exposing the thermally conductive element 120, and thedielectric layer 162 covers the upper surface 132 of the moldingcompound 130 and the first pads 150. The antenna patterns 164 areembedded in the dielectric layer 162 and aligned with the surface 165 ofthe dielectric layer 162 that is relatively far from the moldingcompound 130, and the antenna patterns 164 are electrically connected tothe first pads 150. In addition, the chip package structure 100 a of thepresent embodiment further includes the solder balls 180 disposed on thefan-out pads 174 of the redistribution layer 170 and electricallyconnected to the redistribution layer 170.

Compared with the conventional manufacturing method in which the activesurface of the chip is faced up, the chip 110 and the thermallyconductive element 120 thereon are bonded on the adhesive layer 12 ofthe carrier 10 with the active surface 111 faced down and the thermallyconductive element 120 is disposed on the back surface 113 of the chip110, wherein the molding compound 130 and the opening 163 of thedielectric layer 162 of the antenna structure layer 160 both expose thetop surface 122 of the thermally conductive element 120. Thereby, theheat generated by the chip 110 may be quickly transferred to the outsidevia the thermally conductive element 120, so that the chip packagestructure 100 a of the present embodiment may have a better heatdissipation effect. In addition, the redistribution layer 170 isdisposed on the lower surface 134 of the molding compound 130 andelectrically connected to the electrodes 112 of the chip 110, and theconductive through holes 140, the first pads 150, and the second pads155 are electrically connected to the antenna structure layer 160 andthe redistribution layer 170 such that the chip package structure 100 aof the present embodiment may have better electrical performance. Inshort, the chip package structure 100 a of the present embodiment maysimultaneously have good electrical performance and heat dissipationperformance, so that the function of the chip 110 may be maintainednormally without overheating, and the radiation intensity and gain ofthe antenna patterns 164 may be maintained, thereby effectivelyextending the service life of the chip package structure 100 a. In otherwords, the chip package structure 100 a of this embodiment can beregarded as a chip package structure with a thermal enhanced fan-outantenna-in-package.

It should be mentioned here that, the following embodiments adopt thereference numerals of the embodiments above and a portion of the contentthereof, wherein the same reference numerals are used to represent thesame or similar devices and descriptions of the same technical contentare omitted. The omitted portions are as described in the embodimentsabove and are not repeated in the embodiments below.

FIG. 3 is a cross-sectional view of a chip package structure of anembodiment of the invention. Please refer to FIG. 1J and FIG. 3 at thesame time. A chip package structure 100 b of the present embodiment issimilar to the chip package structure 100 a of FIG. 1J and thedifference between the two is that the thermally conductive element ofthe present embodiment includes a first thermally conductive element 120a and a second thermally conductive element 120 b. The first thermallyconductive element 120 a is fixed on the back surface 113 of the chip110 via the thermal interface material 125, wherein the first thermallyconductive element 120 a is, for example, a heat sink. The secondthermally conductive element 120 b is fixed on the first thermallyconductive element 120 a via the thermal interface material 127, whereinthe second thermally conductive element 120 b is, for example, a coolingfin. Herein, the first thermally conductive element 120 a is locatedbetween the thermal interface material 125 and the thermal interfacematerial 127, and the thermal interface material 127 and the uppersurface 132 of the molding compound 130 are coplanar, but the inventionis not limited thereto. Since the chip package structure 100 b of thepresent embodiment includes the first thermally conductive element 120 aand the second thermally conductive element 120 b, the chip packagestructure 100 b may be used on a high-performance chip 110, therebyimproving the heat dissipation effect of the overall chip packagestructure 100 b.

FIG. 4 is a cross-sectional view of a chip package structure of anotherembodiment of the invention. Please refer to FIG. 1J and FIG. 4 at thesame time. A chip package structure 100 c of the present embodiment issimilar to the chip package structure 100 a of FIG. 1J, and thedifference between the two is that the chip package structure 100 c ofthe present embodiment does not have the antenna structure layer 160,and the chip 110 a of the present embodiment is embodied as a basebandchip. The thermally conductive element 120 is disposed on the backsurface 113 a of the chip 110 a.

In the manufacturing process, after the step of FIG. 1F, that is, afterthe carrier 10 and the adhesive layer 12 are removed and the electrodes112 of the chip 110 and the lower surface 134 of the molding compound130 opposite to the upper surface 132 are exposed, the steps of FIG. 1Jis immediately performed, i.e., steps such as forming the redistributionlayer 170 on the lower surface 134 of the molding compound 130, formingthe solder balls 180 on the fan-out pads 174 of the redistribution layer170, and performing the singulation process.

FIG. 5 is a cross-sectional view of a chip package structure of yetanother embodiment of the invention. Please refer to FIG. 1J and FIG. 5at the same time. A chip package structure 100 d of the presentembodiment is similar to the chip package structure 100 a of FIG. 1J andthe difference between the two is that the at least one chip of thepresent embodiment includes the chip 110 (may be regarded as the firstchip) and the chip 110 a (may be regarded as the second chip). Theantenna patterns 164 are disposed corresponding to the chip 110. Forexample, the antenna patterns 164 are disposed around the periphery ofthe chip 110. Alternatively, an orthographic projection of the antennapatterns 164 on the upper surface 132 of the molding compound 130 iscompletely or partially overlapped with an orthographic projection ofthe chip 110 on the upper surface 132 of the molding compound 130. Anorthographic projection of the antenna patterns 164 on the upper surface132 of the molding compound 130 is not overlapped with an orthographicprojection of the chip 110 a on the upper surface 132 of the moldingcompound 130. Herein, the chip 110 is a radio frequency chip, and thechip 110 a is a baseband chip. That is, the antenna patterns 164 are notprovided at the location corresponding to the baseband chip.

In addition, the thermally conductive element of the present embodimentincludes first thermally conductive elements 120 a and second thermallyconductive elements 120 b. The first thermally conductive elements 120 aare fixed on the back surfaces 113, 113 a of the chips 110, 110 a viathe thermal interface materials 125, wherein each of the first thermallyconductive elements 120 a is, for example, a heat sink. The secondthermally conductive elements 120 b are fixed on the first thermallyconductive elements 120 a respectively via the thermal interfacematerials 127, wherein each of the second thermally conductive elements120 b is, for example, a cooling fin. Herein, the first thermallyconductive elements 120 a are located between the thermal interfacematerials 125 and the thermal interface materials 127, and the thermalinterface materials 127 and the upper surface 132 of the moldingcompound 130 are coplanar, but the invention is not limited thereto.Since the chip package structure 100 d of the present embodimentincludes the first thermally conductive elements 120 a and the secondthermally conductive elements 120 b, the chip package structure 100 dmay be used on the high-performance chips 110, 110 a, thereby improvingthe heat dissipation effect of the overall chip package structure 100 d.

Based on the above, in the design of the chip package structure of theinvention, the thermally conductive element is disposed on the backsurface of the chip, and the top surface of the thermally conductiveelement is exposed by the molding compound. Thereby, the heat generatedby the chip may be quickly transferred to the outside via the thermallyconductive element, so that the chip package structure of the inventionmay have a better heat dissipation effect. In addition, theredistribution layer is disposed on the lower surface of the moldingcompound and is electrically connected to the electrodes of the chip, sothat the chip package structure of the invention may have betterelectrical performance. In short, the chip package structure of theinvention may simultaneously have good electrical performance and heatdissipation performance, so that the function of the chip may bemaintained normally without overheating, thereby effectively extendingthe service life of the chip package structure.

Although the invention has been described with reference to the aboveembodiments, it will be apparent to one of ordinary skill in the artthat modifications to the described embodiments may be made withoutdeparting from the spirit of the invention. Accordingly, the scope ofthe invention is defined by the attached claims not by the abovedetailed descriptions.

What is claimed is:
 1. A chip package structure, comprising: at leastone chip, wherein the respective chip has an active surface and a backsurface opposite to each other and a plurality of electrodes disposed onthe active surface; at least one thermally conductive element disposedon the back surface of the respective chip; a molding compoundencapsulating the at least one chip and the at least one thermallyconductive element and having an upper surface and a lower surfaceopposite to each other, wherein a bottom surface of each of theelectrodes of the respective chip is aligned with the lower surface ofthe molding compound, and the molding compound exposes a top surface ofthe respective thermal conductive element; a redistribution layerdisposed on the lower surface of the molding compound and electricallyconnected to the electrodes of the respective chip; at least oneconductive through hole penetrating the molding compound and connectedto the upper surface and the lower surface of the molding compound; atleast one first pad disposed on the upper surface of the moldingcompound and electrically connected to a first end of the respectiveconductive through hole; at least one second pad disposed on the lowersurface of the molding compound and electrically connected to a secondend of the respective conductive through hole, wherein theredistribution layer is electrically connected to the at least onesecond pad; and an antenna structure layer disposed on the upper surfaceof the molding compound and comprising a dielectric layer and aplurality of antenna patterns, wherein the dielectric layer has at leastone opening exposing the at least one thermally conductive element, thedielectric layer covers the upper surface of the molding compound andthe at least one first pad, the antenna patterns are embedded in thedielectric layer and aligned with a surface of the dielectric layer thatis relatively far from the molding compound, and the antenna patternsare electrically connected to the at least one first pad.
 2. The chippackage structure of claim 1, wherein the at least one chip is at leastone radio frequency chip.
 3. The chip package structure of claim 1,wherein the at least one chip comprises a first chip and a second chip,and the antenna patterns are disposed corresponding to the first chip.4. The chip package structure of claim 3, wherein the first chip is aradio frequency chip and the second chip is a baseband chip.
 5. The chippackage structure of claim 1, wherein the at least one chip is at leastone baseband chip.
 6. The chip package structure of claim 1, furthercomprising: a plurality of solder balls disposed on a plurality offan-out pads of the redistribution layer and electrically connected tothe redistribution layer.
 7. The chip package structure of claim 1,wherein an orthographic projection area of the respective thermallyconductive element on the back surface of the respective chip is smallerthan an area of the back surface.
 8. The chip package structure of claim1, further comprising: at least one thermal interface material disposedbetween the at least one thermally conductive element and the at leastone chip, wherein the at least one thermally conductive element is fixedon the at least one chip via the at least one thermal interfacematerial.